I think that’s the whole point, right? The First Order had scared the galaxy into submission at that point. Luke’s arc in TLJ was about accepting his status as the legend the galaxy needs- no one showed up to help the Resistance on Crait, but after Luke’s mythical stand-off with the First Order, his legend was back stronger than ever and it inspired the entire galaxy to rise up.
I think it’s cool how the general galaxy has an arc where they became complacent after the relatively small Rebellion took down the Empire, and ignored the warning signs of fascism coming back. The New Republic is wiped out, fascism returns, and the people are terrified. It’s the legend of Luke that inspires them to realize they can’t just rely on the Resistance as they did with the Rebellion, and everyone stands up across the galaxy. It’s a pretty relevant and important message to the real world right now too.